US3622445A - Glass-fiber webs employing glass fibers with diameters of3{14 15 microns - Google Patents

Glass-fiber webs employing glass fibers with diameters of3{14 15 microns Download PDF

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US3622445A
US3622445A US729578A US3622445DA US3622445A US 3622445 A US3622445 A US 3622445A US 729578 A US729578 A US 729578A US 3622445D A US3622445D A US 3622445DA US 3622445 A US3622445 A US 3622445A
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glass
fibers
fiber
binder
web
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August Pieter Louis Heidweiler
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KONINKL PAPIERFABRIKEN VAN GEL
KONINKLIJKE PAPIERFABRIKEN VAN GELDER ZONEN NV
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/24—Polyesters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/36—Inorganic fibres or flakes
    • D21H13/38—Inorganic fibres or flakes siliceous
    • D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass fibres

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  • Cl 162/145 chloride in water the weight ratio between the glass fibers on 161/ 162/ 162/156 the one hand and the organic fibers on the other ranging from [51] lnt.Cl. D21f 5/18 1021 to m bringing Said Suspension onto a moving screen [50] Field of Search 162/156, cloth removing the excess of water wih about 5 50 percent 146; 161/170 169 of a binder being added somewhere during the process, and V drying the fiber mat provided with a binder by heating.
  • glass-fiber materials For the manufacture of glass-fiber materials it is customary first to chop up a spun glass to strands having a length of 0.3- cm., such strands typically consisting of 200-400 elementary glass filaments. These chopped strands are blown onto a rotary screen cloth by means of a stream of air, sprayed with a binder, and heated to produce a more or less coherent glass-fiber mat.
  • This prior method has the disadvantage, however, that, owing to the thick glass-fiber strands, it is impossible to produce homogeneous mats having a basic weight of less than 300 g./m. Glass-fiber mats having a basic weight of 300-500 g./m. are also still highly nonuniform in strength characteristics, and they moreover have a very rough surface with various protruding glass-fiber strands.
  • molten glass is drawn to form filaments, which are laid upon a rotary conveyor cloth by means of a stream of air.
  • the product is a more or less homogeneous glass web, which can be made in a thinner form than is possible with the use of a glass-fiber strands.
  • this purpose does not allow the use of high-melting (2,200 C.) alkali-free glass (E-glass), but us limited to the lower melting A-glass (600 C.) or C-glass (about 900 C.).
  • A-glass has an alkali content of about 13 percent and E-glass an alkali content of about 0.6 percent, it will be understood that A-glass is considerably less resistant to weather influences than B- glass, so that the limitation referred to is heavily felt. Moreover, fibrous webs consisting as to 100 percent glass fibers have the great disadvantage that their folding strength, that is their tensile strength is reduced to zero after they have been folded several times.
  • US. Pat. No. 3,035,965 describes a method of making glass fibers containing fibrous webs by processing a nonfibrillating organic fiber material together with about l0 percent by weight, calculated on the organic fibers, of glass fibers by a wet process. Since the fibrous web thus produced largely consist of the organic fibers, however, these webs have the character of the organic fibers used rather than the character of glass-fiber webs.
  • the glass fibers act solely as a carrier material for the binder, which is underlined by the use of highly expensive ultrafine glass fibers having a diameter of 0.2-2.5 microns to ensure a uniform distribution of the binder.
  • Typical commercial glass fibers however, have diameters ranging from 3 to 15 microns, mostly 7 to 12 microns.
  • the present invention relates to glass containing fibrous webs which do-have the character of glass-fiber webs, but do not have the above-described disadvantages, especially with respect to the great loss in tensile strength after being folded several times. It has been found that such webs can be made by first preparing a homogeneous aqueous suspension of fibrous of a C-glass, preferably an E-glass, having a diameter of 4-15 microns and fibers of a material selected from the group of polyesters, polyamides, and polyvinyl chloride, the ratio by weight between the glass fibers on the one hand and the organic fibers on the other ranging from 10:1 to 1:1, bringing said suspension on to a moving screen cloth, removing the excess water, a binder added somewhere during the process, and drying the fiber mat provided with a binder, by heating.
  • a homogeneous aqueous suspension of fibrous of a C-glass preferably an E-glass, having a diameter of 4-15 microns and fibers of
  • polyester fibers has the unexpected result that the values for the tensile strength, the elongation at break, the folding number, and the tensile strength after several times folding do not have a linear relation to the percentage composition, but deviate in favor of the mixtures.
  • the accompanying drawing shows, by way of example, the tensile strength and the elongation at break plotted against the glass/polyester composition, in percent by weight, of a fibrous web of 50 g./m. and containing 25 percent polyvinyl alcohol as a binder. As can be seen the tensile strength ranges from about 15 kg./5 cm. to 28 kg./5 cm.
  • the glass-fiber material is preferably made from the alkalifree E-glass, although C-glass may be used.
  • This glass may be suspended in water in the form of chopped glass yarn, glass pile fibers, or glass wool.
  • the extent to which the glass-fiber strands or the glass wool are disintegrated can be controlled in dependence upon the contemplated use of the finished web. If it is desired to use the end product as surface webs, is desirable for the stands to be disintegrated into their monofilaments as much as possible. On the other hand, if it is desired to use the glass-fiber web for reinforcement purposes, then the glassfiber strands should be milled to a minor extent or not at all, so that an open material is produced, which readily absorbs synthetic resin.
  • the organic fibers may be selected from the group of polyvinyl chloride, polyamides and polyesters. Naturally, mixtures of these kinds of fibers may also be used. We preferably use pile fibers having a length of 5-50 mm. and a thickness of 1.5-50 denier.
  • the cross-sectional configuration of the fibers may be round, for example, but also laminar or triangular. Other cross-sectional configurations are also suitable, and the fibers may be both hollow and solid.
  • the weight ratio between the glass fibers and the organic fibers ranges from l0:l and 1:], preferably from 7:1 to 3:l.
  • the glass fibers and the organic fibers may be dispersed in water together by means of suitable milling equipment; alternatively the glass fibers and the organic fibers may be separately suspended in water, whereafter the two suspensions are combined.
  • the contemplated use of the ready web is of prime importance.
  • polyester fibers are preferred, but for the purpose of reinforcing polyvinyl chloride it is recommendable to use polyvinyl chloride fibers, by virtue of which better adherence is achieved and the stretch characteristics become virtually equal, thereby reducing the risk of delamination to a minimum.
  • urea-formaldehyde, melamine-formaldehyde and phenol resins polyesters, epoxy resins, polyvinyl acetate, polyvinyl alcohol, polyvinyl chloride, polyacrylates, polyurethanes, starch and cellulose derivatives; and various copolymers.
  • a fusible material such as bitumen it is recommendable to use a binder having a higher tensile strength, a lower elongation and a higher melting point than has the fusible material.
  • a combination is as roof-covering material.
  • the glass-fiber web is intended for reinforcing a therrnosetting material, then it is recommendable to select a binder which is soluble in the nonset therrnosetting material.
  • the therrnosetting material acts as a binder.
  • fibrous webs intended for incorporation in a polyester composition we preferably use a styrene-soluble binder.
  • the proportion of the binder is preferably 5-50 percent by weight, calculated on the total weight of the web.
  • the binder can be applied to the fibers by spraying, sprinkling, and/or impregnating the fibers with binder.
  • the binder is added to the aqueous fiber suspension, and a web is formed from this composition on the moving screen cloth.
  • the binder must be used in such a form that during the removal of the water it remains on the copper cloth and in the fibermat being formed; preferably in the form of fibers, water-dispersible granules, or a latex precipitate or coacervate.
  • the subject wet-process made, mixed-fiber webs can be made in any desired thickness. Usually, however, the weight will range from 10 to 500 g./m.”, preferably from 30 to 60 g./m. This means that given a square meter of web product the weight will be between 10 and 500 grams, preferably from 30 to 60 grams.
  • the web thickness will vary with the indicated weights. These webs have excellent strength characteristics as compared with fiber webs produced by the dry process. This is due to the extremely uniform structure of the web. It is thus possible to make fiber webs having a tensile strength in the transverse direction and in the longitudinal direction of 25 kg./5 cm. These values are twice those of conventional webs.
  • EXAMPLE I In a mill having a capacity of 2 liters and a speed of 2,800 r.p.m. 20 g. glass-fiber strands produced from an E-glass, and having a length of mm. and a thickness of 12 microns, were disposed in water for 20 minutes. This fiber suspension was then diluted with water until the dry content was 0.1/0.7 g. of a powdery ureaformaldehyde precondensate, insoluble in cold water, were added and uniformly distributed in the fiber mass by stirring. Five hundred cubic centimeters of the suspension thus obtained was formed into a web on a web-forming device, the web was couched and transferred to a drying plate having a temperature of 150 C.
  • the binder is dissolved in the water that is still present, moves to the points where the fibers are in contact with each other, and causes the fibers to adhere together upon further drying. Finally the product was heated at 160 C. for 2 further minutes to fully condense the ureaformaldchyde resin.
  • a method of making a glass-fiber web having low weight per square meter and a high folding strength which comprises preparing a homogeneous suspension consisting essentially of fibers of a glass having a melting point of above about 900 C., a low alkali content and a diameter of 3-15 microns as the only inorganic fibers, fibers of a material selected from the group consisting of the polyesters, polyamides and polyvinyl chloride, and from about 5-50 percent by weight of a binder in water, the weight ratio between the glass fibers on the one hand and the organic fibers on the other ranging from 10:1 to
  • organic fibers are polyester pile fibers having a length of [-30 mm. and a thickness of 1.5-50 denier.
  • a method according to claim 1, wherein there is thus produced a fiber web has a weight of 10-500 g./m.
  • a glass-fiber web consisting essentially of a homogeneous mixture of glass fibers having a melting point of about about 900 C., a low alkali content, and a diameter of from 3 to 15 microns as the only inorganic fibers; organic fibers of a material selected from the group consisting of polyesters, polyamides, and polyvinylchloride; and a binder; the weight ratio between the glass fibers and organic fibers being from 10:] to 1:1; and the binder being present at from about 5 to 50 percent by weight; said web having a weight of about 10-500 g./m. and a tensile strength of about 15 kg./5 cm. to 28 kg./5 cm.

Abstract

Glass-fiber webs having a low weight per square meter and superior strength characteristics are made by preparing a homogeneous suspension of fibers of a glass selected from the group of C and E glasses, having a diameter of 3-15 microns, and fibers of a material selected from the group consisting of the polyesters, polyamides and polyvinyl chloride, in water, the weight ratio between the glass fibers on the one hand and the organic fibers on the other ranging from 10:1 to 1:1, bringing said suspension onto a moving screen cloth, removing the excess of water with about 5-50 percent of a binder being added somewhere during the process, and drying the fiber mat provided with a binder by heating.

Description

United States Patent 1111 [72] Inventor August Pieter: Louislleidweiller [56] References Cited Apeldoorn, Netherlands UNITED STATES PATENTS 1 PP 729,578 3,035,965 5/1962 Mathews 162/145 [22] Ftled May 16, 1968 v 6,
2,962,414 ll/l960 Arledter.. 162/145 [451 Pmmed 3 441 412 4/l969 Foster 162/145 [73] Assignee Konlnklilke Paplerfabriken Van Gelder Zonen N.V. Primary Examiner-S. Leon Bashore Amsterdam, Netherlands Assistant Examiner-Richard l-l. Tushin [32] Priority May 18, 1967 Attorney-Diner, Brow, Ramik & Holt [33] Netherlands 67 06889 [31 l ABSTRACT: Glass-fiber webs having a low weight per square meter and superior strength characteristics are made by 54 GLASS-FIBER WEBS EMPLOYING GLASS FIBERS preparing a homogeneous suspension of fibers of a glass WITH DIAMETERS 053-15 MICRQNS selected from the group of C and E glasses, having a diameter 10 Claims, 1 Drawing Fig. of 3-15 microns, and fibers of a material selected from the group consisting of the polyesters, polyamides and polyvinyl [52] US. Cl 162/145, chloride in water the weight ratio between the glass fibers on 161/ 162/ 162/156 the one hand and the organic fibers on the other ranging from [51] lnt.Cl. D21f 5/18 1021 to m bringing Said Suspension onto a moving screen [50] Field of Search 162/156, cloth removing the excess of water wih about 5 50 percent 146; 161/170 169 of a binder being added somewhere during the process, and V drying the fiber mat provided with a binder by heating.
PAIENTEUuuv 23 ml 3'. 622.445
' elongation at break in I. l l l I I. l 1 l 1 I 0 L0 I. polyester glass I. 100 Q) 80 70 $0 50 1.0 30 20 10 0 INVENTOR. AUGUST P\ETER LOUIS HEJDWEILLER Wm rMW A' 'I'O R N FLYS GLASS-FIBER WEBS EMPLOYING GLASS FIBERS WITH DIAMETERS OF3-l 5 MICRONS This invention relates to a method of making glass-fiber webs. Glass-fiber webs or glass-fiber mats are presently being used on a considerable scale for reinforcing synthetic resin materials in order to improve the strength characteristics of the products made from these synthetic materials.
For the manufacture of glass-fiber materials it is customary first to chop up a spun glass to strands having a length of 0.3- cm., such strands typically consisting of 200-400 elementary glass filaments. These chopped strands are blown onto a rotary screen cloth by means of a stream of air, sprayed with a binder, and heated to produce a more or less coherent glass-fiber mat. This prior method has the disadvantage, however, that, owing to the thick glass-fiber strands, it is impossible to produce homogeneous mats having a basic weight of less than 300 g./m. Glass-fiber mats having a basic weight of 300-500 g./m. are also still highly nonuniform in strength characteristics, and they moreover have a very rough surface with various protruding glass-fiber strands.
Accordingly, for reinforcement purposes, there is usually additionally used a surface web in order to achieve a smooth surface.
According to another method, molten glass is drawn to form filaments, which are laid upon a rotary conveyor cloth by means of a stream of air. After the addition of a binder, followed by drying, the product is a more or less homogeneous glass web, which can be made in a thinner form than is possible with the use of a glass-fiber strands. For technical reasons, this purpose does not allow the use of high-melting (2,200 C.) alkali-free glass (E-glass), but us limited to the lower melting A-glass (600 C.) or C-glass (about 900 C.). Since A-glass has an alkali content of about 13 percent and E-glass an alkali content of about 0.6 percent, it will be understood that A-glass is considerably less resistant to weather influences than B- glass, so that the limitation referred to is heavily felt. Moreover, fibrous webs consisting as to 100 percent glass fibers have the great disadvantage that their folding strength, that is their tensile strength is reduced to zero after they have been folded several times.
Finally, US. Pat. No. 3,035,965 describes a method of making glass fibers containing fibrous webs by processing a nonfibrillating organic fiber material together with about l0 percent by weight, calculated on the organic fibers, of glass fibers by a wet process. Since the fibrous web thus produced largely consist of the organic fibers, however, these webs have the character of the organic fibers used rather than the character of glass-fiber webs.
Indeed, the glass fibers act solely as a carrier material for the binder, which is underlined by the use of highly expensive ultrafine glass fibers having a diameter of 0.2-2.5 microns to ensure a uniform distribution of the binder. Typical commercial glass fibers, however, have diameters ranging from 3 to 15 microns, mostly 7 to 12 microns.
The present invention relates to glass containing fibrous webs which do-have the character of glass-fiber webs, but do not have the above-described disadvantages, especially with respect to the great loss in tensile strength after being folded several times. It has been found that such webs can be made by first preparing a homogeneous aqueous suspension of fibrous of a C-glass, preferably an E-glass, having a diameter of 4-15 microns and fibers of a material selected from the group of polyesters, polyamides, and polyvinyl chloride, the ratio by weight between the glass fibers on the one hand and the organic fibers on the other ranging from 10:1 to 1:1, bringing said suspension on to a moving screen cloth, removing the excess water, a binder added somewhere during the process, and drying the fiber mat provided with a binder, by heating.
The addition of polyester fibers has the unexpected result that the values for the tensile strength, the elongation at break, the folding number, and the tensile strength after several times folding do not have a linear relation to the percentage composition, but deviate in favor of the mixtures. The same applies, although to a somewhat lesser extent, to the addition of polyamide and polyvinyl chloride fibers. The accompanying drawing shows, by way of example, the tensile strength and the elongation at break plotted against the glass/polyester composition, in percent by weight, of a fibrous web of 50 g./m. and containing 25 percent polyvinyl alcohol as a binder. As can be seen the tensile strength ranges from about 15 kg./5 cm. to 28 kg./5 cm.
These favorable mechanical characteristics of the subject mixed-fiber webs render them suitable not only for reinforcing synthetic resin materials, but as a carrier material if a strong, yet flexible, rot-resistant, and dimensionally stable carrier material is required.
The glass-fiber material is preferably made from the alkalifree E-glass, although C-glass may be used. This glass may be suspended in water in the form of chopped glass yarn, glass pile fibers, or glass wool. The extent to which the glass-fiber strands or the glass wool are disintegrated can be controlled in dependence upon the contemplated use of the finished web. If it is desired to use the end product as surface webs, is desirable for the stands to be disintegrated into their monofilaments as much as possible. On the other hand, if it is desired to use the glass-fiber web for reinforcement purposes, then the glassfiber strands should be milled to a minor extent or not at all, so that an open material is produced, which readily absorbs synthetic resin.
As stated before, the organic fibers may be selected from the group of polyvinyl chloride, polyamides and polyesters. Naturally, mixtures of these kinds of fibers may also be used. We preferably use pile fibers having a length of 5-50 mm. and a thickness of 1.5-50 denier. The cross-sectional configuration of the fibers may be round, for example, but also laminar or triangular. Other cross-sectional configurations are also suitable, and the fibers may be both hollow and solid.
The weight ratio between the glass fibers and the organic fibers ranges from l0:l and 1:], preferably from 7:1 to 3:l. The glass fibers and the organic fibers may be dispersed in water together by means of suitable milling equipment; alternatively the glass fibers and the organic fibers may be separately suspended in water, whereafter the two suspensions are combined.
In selecting the organic fibers, the contemplated use of the ready web is of prime importance. For a dimensionally stable end product polyester fibers are preferred, but for the purpose of reinforcing polyvinyl chloride it is recommendable to use polyvinyl chloride fibers, by virtue of which better adherence is achieved and the stretch characteristics become virtually equal, thereby reducing the risk of delamination to a minimum.
For the binder a great variety of known per se materials may be used, for example, urea-formaldehyde, melamine-formaldehyde and phenol resins, polyesters, epoxy resins, polyvinyl acetate, polyvinyl alcohol, polyvinyl chloride, polyacrylates, polyurethanes, starch and cellulose derivatives; and various copolymers. If the web is intended for reinforcing a fusible material, such as bitumen it is recommendable to use a binder having a higher tensile strength, a lower elongation and a higher melting point than has the fusible material. One contemplated use of such a combination is as roof-covering material. On the other hand, if the glass-fiber web is intended for reinforcing a therrnosetting material, then it is recommendable to select a binder which is soluble in the nonset therrnosetting material. As a matter of fact, after the setting, the therrnosetting material acts as a binder. For fibrous webs intended for incorporation in a polyester composition, we preferably use a styrene-soluble binder.
The proportion of the binder is preferably 5-50 percent by weight, calculated on the total weight of the web.
The binder can be applied to the fibers by spraying, sprinkling, and/or impregnating the fibers with binder. Preferably, the binder is added to the aqueous fiber suspension, and a web is formed from this composition on the moving screen cloth. In that case, the binder must be used in such a form that during the removal of the water it remains on the copper cloth and in the fibermat being formed; preferably in the form of fibers, water-dispersible granules, or a latex precipitate or coacervate.
The subject wet-process made, mixed-fiber webs can be made in any desired thickness. Mostly, however, the weight will range from 10 to 500 g./m.", preferably from 30 to 60 g./m. This means that given a square meter of web product the weight will be between 10 and 500 grams, preferably from 30 to 60 grams. The web thickness will vary with the indicated weights. These webs have excellent strength characteristics as compared with fiber webs produced by the dry process. This is due to the extremely uniform structure of the web. It is thus possible to make fiber webs having a tensile strength in the transverse direction and in the longitudinal direction of 25 kg./5 cm. These values are twice those of conventional webs.
The invention is illustrated in and by the following examples.
EXAMPLE I In a mill having a capacity of 2 liters and a speed of 2,800 r.p.m. 20 g. glass-fiber strands produced from an E-glass, and having a length of mm. and a thickness of 12 microns, were disposed in water for 20 minutes. This fiber suspension was then diluted with water until the dry content was 0.1/0.7 g. of a powdery ureaformaldehyde precondensate, insoluble in cold water, were added and uniformly distributed in the fiber mass by stirring. Five hundred cubic centimeters of the suspension thus obtained was formed into a web on a web-forming device, the web was couched and transferred to a drying plate having a temperature of 150 C. During the heating the binder is dissolved in the water that is still present, moves to the points where the fibers are in contact with each other, and causes the fibers to adhere together upon further drying. Finally the product was heated at 160 C. for 2 further minutes to fully condense the ureaformaldchyde resin.
This whole treatment was repeated, employing 15 g. glassfiber strands and 5 g. polyamide (poly-e-caprolactam) pile fibers having a length of 15 mm. and a thickness of denier.
The properties of the two fiber webs are shown in the following table.
TABLE I fiber composition tensile strength after times folding in kg./5 cm. xx 0 x) Folding number according to KiJ'hler-Molln at a load of 800 g.) l .5 cm. xx) Determination of tensile strength according to Brecht-Wesp under a load of 6 KG.
EXAMPLE 11 Example (Terlenka) having was repeated, employing instead of ureaformaldehyde precondensate the same quantity 4 5r oiyi'ifiyiii ilai, an d ins tead of the poly-e-caprolactam fibers the same quantity of polyethylene glycol-terephthalate fibers (Terlenka)having a length of 6 mm. and a thickness of 1.5 denier.
x) Folding number according to must-M r" at a load of 400 g./ 1.5 cm. i 7
We claim:
1. A method of making a glass-fiber web having low weight per square meter and a high folding strength, which comprises preparing a homogeneous suspension consisting essentially of fibers of a glass having a melting point of above about 900 C., a low alkali content and a diameter of 3-15 microns as the only inorganic fibers, fibers of a material selected from the group consisting of the polyesters, polyamides and polyvinyl chloride, and from about 5-50 percent by weight of a binder in water, the weight ratio between the glass fibers on the one hand and the organic fibers on the other ranging from 10:1 to
- 1:1; bringing said suspension onto a moving screen cloth;
removing the excess of water; and drying the fiber mat provided with said binder by heating.
2. A method according to claim 1, wherein the weight of ratio of the glass fibers to organic fibers is 7:1 to 3:1.
3. A method according to claim 1, wherein the glass fibers are made of an alkali-free glass.
4. A method according to claim 1, wherein the organic fibers are polyester pile fibers having a length of [-30 mm. and a thickness of 1.5-50 denier.
5. A method according to claim 1, wherein there is thus produced a fiber web has a weight of 10-500 g./m.
6. A method according to claim 5, wherein the thusproduced web has a weight of 30-60 g./m..
7. The method of claim 1 wherein the glass fiber has a diameter of from 7 to 12 microns.
8. A glass-fiber web consisting essentially of a homogeneous mixture of glass fibers having a melting point of about about 900 C., a low alkali content, and a diameter of from 3 to 15 microns as the only inorganic fibers; organic fibers of a material selected from the group consisting of polyesters, polyamides, and polyvinylchloride; and a binder; the weight ratio between the glass fibers and organic fibers being from 10:] to 1:1; and the binder being present at from about 5 to 50 percent by weight; said web having a weight of about 10-500 g./m. and a tensile strength of about 15 kg./5 cm. to 28 kg./5 cm.
9. The glass-fiber web of claim 8 wherein said web has a weight of about 30-60 g./m.
10. The glass-fiber web of claim 8 wherein the glass fibers have a melting point of about 1,200 C., are alkali free, and
have a diameter of from 7 to 12 microns.

Claims (9)

  1. 2. A method according to claim 1, wherein the weight ratio of the glass fibers to organic fibers is 7:1 to 3:1.
  2. 3. A method according to claim 1, wherein the glass fibers are made of an alkali-free glass.
  3. 4. A method according to claim 1, wherein the organic fibers are polyester pile fibers having a length of 1-30 mm. and a thickness of 1.5-50 denier.
  4. 5. A method according to claim 1, whereiN there is thus produced a fiber web has a weight of 10-500 g./m.2.
  5. 6. A method according to claim 5, wherein the thus-produced web has a weight of 30-60 g./m.2.
  6. 7. The method of claim 1 wherein the glass fiber has a diameter of from 7 to 12 microns.
  7. 8. A glass-fiber web consisting essentially of a homogeneous mixture of glass fibers having a melting point of above about 900* C., a low alkali content, and a diameter of from 3 to 15 microns as the only inorganic fibers; organic fibers of a material selected from the group consisting of polyesters, polyamides, and polyvinylchloride; and a binder; the weight ratio between the glass fibers and organic fibers being from 10:1 to 1: 1; and the binder being present at from about 5 to 50 percent by weight; said web having a weight of about 10-500 g./m.2 and a tensile strength of about 15 kg./5 cm. to 28 kg./5 cm.
  8. 9. The glass-fiber web of claim 8 wherein said web has a weight of about 30- 60 g./m.2.
  9. 10. The glass-fiber web of claim 8 wherein the glass fibers have a melting point of about 1,200* C., are alkali free, and have a diameter of from 7 to 12 microns.
US729578A 1967-05-18 1968-05-16 Glass-fiber webs employing glass fibers with diameters of3{14 15 microns Expired - Lifetime US3622445A (en)

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Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937865A (en) * 1970-11-11 1976-02-10 Koninklijke Papierfabrieken Van Gelder Zonen N.V. Reinforced plastics carrier for printed circuits
US4138521A (en) * 1974-11-14 1979-02-06 Nairn Floors Limited Flooring materials
DE2835935A1 (en) * 1977-08-23 1979-03-01 Mitsubishi Paper Mills Ltd Dimensionally stable glass fibre-contg. nonwoven sheet prodn. - comprises adding PVA binder and resin latex flocculant to mixed fibre suspension
US4247364A (en) * 1979-07-02 1981-01-27 Armstrong Cork Company Method of making a smooth, dimensionally stable, mica-filled, glass fiber sheet
US4293378A (en) * 1980-01-10 1981-10-06 Max Klein Enhanced wet strength filter mats to separate particulates from fluids and/or coalesce entrained droplets from gases
US4344775A (en) * 1979-03-08 1982-08-17 Max Klein Method for separating gases liquid droplets and/or solid particles from gases or vapors
USRE31124E (en) * 1970-11-11 1983-01-11 Koninklijke Papierfabrieken Van Gelder Zonen N.V. Reinforced plastics carrier for printed circuits
US4394146A (en) * 1981-09-29 1983-07-19 Crane & Co., Inc. Filter apparatus
US4410411A (en) * 1973-01-17 1983-10-18 Diamond Shamrock Corporation Dimensionally stable asbestos diaphragms
US4489025A (en) * 1973-01-17 1984-12-18 Diamond Shamrock Chemicals Company Preparation of dimensionally stable asbestos diaphragms
US4532006A (en) * 1983-08-05 1985-07-30 The Flintkote Company Inorganic fiber mat using mineral wool and related process and apparatus
US4566969A (en) * 1981-09-29 1986-01-28 Crane & Co., Inc. Rolling filter apparatus
US4701250A (en) * 1973-01-17 1987-10-20 Eltech Systems Corporation Dimensionally stable asbestos diaphragm coated foraminous cathode
DK156228B (en) * 1977-01-26 1989-07-10 Dexter Corp PROCEDURE FOR CONTINUOUS PREPARATION OF A LIGHT OF INORGANIC FIBERS CONSISTING COURSE MATERIAL
US5154798A (en) * 1987-07-16 1992-10-13 Montefibre S.P.A. Felts and nonwoven fabrics based on polyester fibers and glass fibers and process for obtaining same
US5273821A (en) * 1991-11-12 1993-12-28 The Carborundum Company High strength ceramic fiber board
WO1994021452A1 (en) * 1993-03-24 1994-09-29 E.I. Du Pont De Nemours And Company Wet-laid sheet material and composites thereof
US5614312A (en) * 1993-05-07 1997-03-25 E. I. Du Pont De Nemours And Company Wet-laid sheet material and composites thereof
FR2742172A1 (en) * 1995-12-12 1997-06-13 Vetrotex France Sa PROCESS FOR PRODUCING A GLASS MAT AND RESULTING PRODUCT
US6120643A (en) * 1999-10-27 2000-09-19 E. I. Du Pont De Nemours And Company Aramid and glass fiber absorbent papers
US6267843B1 (en) 1996-03-20 2001-07-31 Owens Corning Fiberglas Technology, Inc. Wet-laid nonwoven mat and a process for making same
US6440558B2 (en) * 1999-04-09 2002-08-27 Schuller Gmbh Process and apparatus for the manufacture of composite fibrous strand comprising glass fibers
US6458244B1 (en) * 1999-01-22 2002-10-01 Sichuan Foreign Economic Relations & Trade Corporation Synthetic fiber paper
US6497787B1 (en) * 2000-04-18 2002-12-24 Owens-Corning Veil Netherlands B.V. Process of manufacturing a wet-laid veil
EP1319746A1 (en) * 2001-12-12 2003-06-18 Owens-Corning Veil Netherlands B.V. Wet-laid nonwoven reinforcing mat
US20030124932A1 (en) * 2000-02-09 2003-07-03 Michel Droux Glass fibre mat and use thereof for built-up roofing
US20040197468A1 (en) * 2002-12-19 2004-10-07 Paul Geel Methods of forming flexible decorative veils
US20050208861A1 (en) * 2004-03-19 2005-09-22 Invista North America S.A R.L. Asphalt coated polyester glass mats
EP1541763A3 (en) * 2003-11-20 2006-09-27 Johns Manville International, Inc. Method of making tough, flexible mats and tough, flexible mats
US20060292948A1 (en) * 2005-06-27 2006-12-28 Geel Paul A Fibrous veil impregnated with surface finish formulation
US20070071946A1 (en) * 2005-09-29 2007-03-29 Northern Elastomeric, Inc. Rubberized roof underlayment
US20080014814A1 (en) * 2006-07-13 2008-01-17 Geel Paul A Highly filled fibrous veil
US20080083522A1 (en) * 2006-10-05 2008-04-10 Georgia-Pacific Chemicals Llc Urea-formaldehyde resin composition and process for making fiber mats
US20100119784A1 (en) * 2005-09-29 2010-05-13 Northern Elastomeric, Inc. Rubberized roof underlayment
US20100143684A1 (en) * 2004-06-18 2010-06-10 Owens Corning Fibrous veil impregnated with surface finish formulation
JP2010253391A (en) * 2009-04-24 2010-11-11 Hokuetsu Kishu Paper Co Ltd Low-basis-weight filter medium for air filter
US20110104461A1 (en) * 2009-09-28 2011-05-05 Owens Corning Intellectual Capital, Llc Underlayment with slip-resistant surface
WO2011146271A1 (en) * 2010-05-21 2011-11-24 Hollingsworth & Vose Company Surface modified glass fibers
US20120220911A1 (en) * 2010-01-06 2012-08-30 The Curators Of The University Of Missouri Wound care
US8568563B1 (en) * 2013-01-14 2013-10-29 Jonhs Manville Methods of making a non-woven fire barrier mat
CN109653019A (en) * 2019-01-23 2019-04-19 尹精华 A kind of preparation process of fully synthetic fiber F8 grades of air filting materials

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JPS5970515A (en) * 1982-10-14 1984-04-21 Japan Vilene Co Ltd Preparation of glass fiber reinforced phenol resin foam
JPS59112099A (en) * 1982-12-15 1984-06-28 日本無機株式会社 Production of glass paper
FR2571388B1 (en) * 1984-10-05 1987-01-16 Dalle & Lecomte Papeteries NON WOVEN PRODUCT IN LONG FIBER SHEET AND ITS MANUFACTURING PROCESS
JPH01318045A (en) † 1988-05-10 1989-12-22 E I Du Pont De Nemours & Co Composite material composed of wet molding mixture of glass fiber and thermoplastic fiber

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US3035965A (en) * 1958-09-23 1962-05-22 Kimberly Clark Co Paper composed of synthetic fibers, and fibrous binder for use in the manufacture thereof
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US3035965A (en) * 1958-09-23 1962-05-22 Kimberly Clark Co Paper composed of synthetic fibers, and fibrous binder for use in the manufacture thereof
US3441472A (en) * 1965-10-11 1969-04-29 Hollingsworth & Vose Co Method of forming glass-asbestos water-laid sheet

Cited By (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE31124E (en) * 1970-11-11 1983-01-11 Koninklijke Papierfabrieken Van Gelder Zonen N.V. Reinforced plastics carrier for printed circuits
US3937865A (en) * 1970-11-11 1976-02-10 Koninklijke Papierfabrieken Van Gelder Zonen N.V. Reinforced plastics carrier for printed circuits
US4489025A (en) * 1973-01-17 1984-12-18 Diamond Shamrock Chemicals Company Preparation of dimensionally stable asbestos diaphragms
US4410411A (en) * 1973-01-17 1983-10-18 Diamond Shamrock Corporation Dimensionally stable asbestos diaphragms
US4701250A (en) * 1973-01-17 1987-10-20 Eltech Systems Corporation Dimensionally stable asbestos diaphragm coated foraminous cathode
US4138521A (en) * 1974-11-14 1979-02-06 Nairn Floors Limited Flooring materials
DK156228B (en) * 1977-01-26 1989-07-10 Dexter Corp PROCEDURE FOR CONTINUOUS PREPARATION OF A LIGHT OF INORGANIC FIBERS CONSISTING COURSE MATERIAL
DE2835935A1 (en) * 1977-08-23 1979-03-01 Mitsubishi Paper Mills Ltd Dimensionally stable glass fibre-contg. nonwoven sheet prodn. - comprises adding PVA binder and resin latex flocculant to mixed fibre suspension
US4344775A (en) * 1979-03-08 1982-08-17 Max Klein Method for separating gases liquid droplets and/or solid particles from gases or vapors
US4247364A (en) * 1979-07-02 1981-01-27 Armstrong Cork Company Method of making a smooth, dimensionally stable, mica-filled, glass fiber sheet
US4293378A (en) * 1980-01-10 1981-10-06 Max Klein Enhanced wet strength filter mats to separate particulates from fluids and/or coalesce entrained droplets from gases
US4394146A (en) * 1981-09-29 1983-07-19 Crane & Co., Inc. Filter apparatus
US4566969A (en) * 1981-09-29 1986-01-28 Crane & Co., Inc. Rolling filter apparatus
US4532006A (en) * 1983-08-05 1985-07-30 The Flintkote Company Inorganic fiber mat using mineral wool and related process and apparatus
US5154798A (en) * 1987-07-16 1992-10-13 Montefibre S.P.A. Felts and nonwoven fabrics based on polyester fibers and glass fibers and process for obtaining same
US5273821A (en) * 1991-11-12 1993-12-28 The Carborundum Company High strength ceramic fiber board
WO1994021452A1 (en) * 1993-03-24 1994-09-29 E.I. Du Pont De Nemours And Company Wet-laid sheet material and composites thereof
US5614312A (en) * 1993-05-07 1997-03-25 E. I. Du Pont De Nemours And Company Wet-laid sheet material and composites thereof
US6034006A (en) * 1995-12-12 2000-03-07 Vetrotex France S.A. Process for manufacturing a glass mat and product resulting therefrom
WO1997021861A2 (en) * 1995-12-12 1997-06-19 Vetrotex France S.A. Method for making a glass mat and resulting product
WO1997021861A3 (en) * 1995-12-12 1997-08-14 Vetrotex France Sa Method for making a glass mat and resulting product
FR2742172A1 (en) * 1995-12-12 1997-06-13 Vetrotex France Sa PROCESS FOR PRODUCING A GLASS MAT AND RESULTING PRODUCT
US6267843B1 (en) 1996-03-20 2001-07-31 Owens Corning Fiberglas Technology, Inc. Wet-laid nonwoven mat and a process for making same
US6365001B1 (en) 1996-03-20 2002-04-02 Owens Corning Fiberglas Technology, Inc. Wet-laid nonwoven mat and a process for making same
US6458244B1 (en) * 1999-01-22 2002-10-01 Sichuan Foreign Economic Relations & Trade Corporation Synthetic fiber paper
US6551456B2 (en) * 1999-01-22 2003-04-22 Sichuan Foreign Economic Relations & Trade Corporation Process to prepare synthetic fiber paper
US6440558B2 (en) * 1999-04-09 2002-08-27 Schuller Gmbh Process and apparatus for the manufacture of composite fibrous strand comprising glass fibers
US6120643A (en) * 1999-10-27 2000-09-19 E. I. Du Pont De Nemours And Company Aramid and glass fiber absorbent papers
US20030124932A1 (en) * 2000-02-09 2003-07-03 Michel Droux Glass fibre mat and use thereof for built-up roofing
US6497787B1 (en) * 2000-04-18 2002-12-24 Owens-Corning Veil Netherlands B.V. Process of manufacturing a wet-laid veil
EP1319746A1 (en) * 2001-12-12 2003-06-18 Owens-Corning Veil Netherlands B.V. Wet-laid nonwoven reinforcing mat
US20040197468A1 (en) * 2002-12-19 2004-10-07 Paul Geel Methods of forming flexible decorative veils
EP1541763A3 (en) * 2003-11-20 2006-09-27 Johns Manville International, Inc. Method of making tough, flexible mats and tough, flexible mats
US20050208861A1 (en) * 2004-03-19 2005-09-22 Invista North America S.A R.L. Asphalt coated polyester glass mats
US20100143684A1 (en) * 2004-06-18 2010-06-10 Owens Corning Fibrous veil impregnated with surface finish formulation
US20060292948A1 (en) * 2005-06-27 2006-12-28 Geel Paul A Fibrous veil impregnated with surface finish formulation
US20100119784A1 (en) * 2005-09-29 2010-05-13 Northern Elastomeric, Inc. Rubberized roof underlayment
US9702148B2 (en) 2005-09-29 2017-07-11 Owens Corning Intellectual Capital, Llc Rubberized roof underlayment
US20070071946A1 (en) * 2005-09-29 2007-03-29 Northern Elastomeric, Inc. Rubberized roof underlayment
US20080014814A1 (en) * 2006-07-13 2008-01-17 Geel Paul A Highly filled fibrous veil
US20080083522A1 (en) * 2006-10-05 2008-04-10 Georgia-Pacific Chemicals Llc Urea-formaldehyde resin composition and process for making fiber mats
US8257554B2 (en) * 2006-10-05 2012-09-04 Georgia-Pacific Chemicals Llc Urea-formaldehyde resin composition and process for making fiber mats
CN102405088B (en) * 2009-04-24 2015-04-01 北越纪州制纸株式会社 Low-basis-weight filter media for air filters
JP2010253391A (en) * 2009-04-24 2010-11-11 Hokuetsu Kishu Paper Co Ltd Low-basis-weight filter medium for air filter
EP2422866A1 (en) * 2009-04-24 2012-02-29 Hokuetsu Kishu Paper Co., Ltd. Low-basis-weight filter media for air filters
CN102405088A (en) * 2009-04-24 2012-04-04 北越纪州制纸株式会社 Low-basis-weight filter media for air filters
EP2422866A4 (en) * 2009-04-24 2013-04-24 Hokuetsu Kishu Paper Co Ltd Low-basis-weight filter media for air filters
US20110104461A1 (en) * 2009-09-28 2011-05-05 Owens Corning Intellectual Capital, Llc Underlayment with slip-resistant surface
US9493954B2 (en) 2009-09-28 2016-11-15 Owens Corning Intellectual Capital, Llc Underlayment with slip-resistant surface
US8535710B2 (en) * 2010-01-06 2013-09-17 The Curators Of The University Of Missouri Wound care
US9486554B2 (en) 2010-01-06 2016-11-08 The Curators Of The University Of Missouri Wound care compositions comprising borate (B2O3) glass-based particles
US20120220911A1 (en) * 2010-01-06 2012-08-30 The Curators Of The University Of Missouri Wound care
US10624982B2 (en) 2010-01-06 2020-04-21 The Curators Of The University Of Missouri Wound care compositions
WO2011146271A1 (en) * 2010-05-21 2011-11-24 Hollingsworth & Vose Company Surface modified glass fibers
US8568563B1 (en) * 2013-01-14 2013-10-29 Jonhs Manville Methods of making a non-woven fire barrier mat
CN109653019A (en) * 2019-01-23 2019-04-19 尹精华 A kind of preparation process of fully synthetic fiber F8 grades of air filting materials
CN109653019B (en) * 2019-01-23 2020-10-30 尹精华 Preparation process of fully synthetic fiber F8-grade air filter material

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Publication number Publication date
AT294004B (en) 1971-11-10
DE1760438A1 (en) 1971-11-18
FI48615C (en) 1974-11-11
NL6706889A (en) 1968-11-19
DE1760438B2 (en) 1976-06-10
ES354049A1 (en) 1969-11-01
SE341156B (en) 1971-12-13
FR1567461A (en) 1969-05-16
GB1211803A (en) 1970-11-11
BE715130A (en) 1968-09-30
FI48615B (en) 1974-07-31
DE1760438C3 (en) 1978-05-24
NO122144B (en) 1971-05-24
NL133247C (en)
CH501566A (en) 1971-01-15

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